Full-Band Oversized Turnstile-Based Waveguide Four-Way Power Divider/Combiner for High-Power Applications

Electronics

Franco Di Paolo¹  Paolo Colantonio¹  JuanLuis Cano²  Angel Mediavilla² 

[1] Department of Ingegneria Elettronica, Universitá degli Studi di Roma Tor Vergata, Via del Politecnico, 1, 00133 Roma, Italy;Department of Ingeniería de Comunicaciones, Edif. Ingeniería de Telecomunicación, Universidad de Cantabria, Plaza de la Ciencia s/n, 39005 Santander, Spain;

关键词: high power amplifiers;    full-band;    power combiner;    power divider;    turnstile junction;    waveguide;    spatial power amplifiers;   

DOI  :  10.3390/electronics8020193

来源: DOAJ

【 摘 要 】

Very high-power and high-efficiency microwave applications require waveguide structures to combine/divide the power from/to a variable number of high-power solid-state devices. In the literature, among the different waveguide configurations, those capable of providing the maximum output power show a limited relative bandwidth. To overcome this limitation, in this paper a full-band (40%) waveguide power divider/combiner specifically designed for high-power applications (up to several kW) is presented. The proposed structure uses an evolved turnstile junction with a standard rectangular waveguide common port, rotated 45°, with respect to its central axis, to divide/combine the signal to/from the four output/input rectangular ports. The inclusion of an oversized central cavity together with circular and rectangular waveguide impedance transformers at the common port allows the achievement of a full-band operation with excellent electrical performance, while maintaining a very simple and compact configuration. Only two layers of metal are required for the physical implementation of this structure in platelet configuration. A prototype has been designed covering the full Ka-band (26.5⁻40 GHz), showing an excellent measured performance with around 30 dB of return loss, 0.18 dB of insertion loss, and less than 1.5° of phase imbalance.

【 授权许可】

Unknown